// 当scss遇到module之后,所有的类名全部摊平
.box {
    background: green;
    box-sizing: border-box;
    padding: 50px;
    .nav {
        display: flex;
        justify-content: space-between;
        .item {
            border: 2px solid yellow;
            border-radius: 4px;
            color: white;
            font-size: 20px;
            font-weight: bolder;
        }
    }
}

